Apple smartphone owners often find themselves in a situation where they urgently need to install a new version of the operating system, but there is no stable wireless connection. This issue is especially relevant for the model iPhone X, which remains popular despite its age, but requires up-to-date software to run many apps. Mobile internet speeds on modern 4G and LTE networks often exceed those of home Wi-Fi, making this method a viable alternative.
However, downloading heavy data packages through a mobile operator has its own technical nuances and limitations that must be considered before beginning the process. Unlike a wireless network, a cellular network requires more careful monitoring of traffic and battery life, as interruptions in connection can lead to installation errors. We'll cover all the steps involved in preparing and performing the update so you can safely update your device.
Technical limitations and requirements for LTE update
The first thing you'll encounter when attempting to start the process is Apple's system restrictions. By default, the company blocks downloading large update files over mobile networks to protect users from unintentionally using up data. Typically, the limit is set at 150-200 MB, and if the package is larger, the system will require a Wi-Fi connection. However, in modern versions of iOS, you can bypass this limitation or force the download.
A critical condition is the availability of sufficient free space on the device. The firmware files weigh several gigabytes, and even if they are downloaded, they will require a significant amount of memory to unpack and install. If iPhone X If more than 90% of the storage is occupied, the system may not even offer downloads, regardless of the connection type.
⚠️ Important: Make sure your data plan includes unlimited data or sufficient data allowance. Downloading an iOS update can consume 3 to 6 GB of data, which can add up to significant charges if you have metered data.
Signal stability is also important to consider. Unlike a router, which is usually stationary, a mobile phone can move, enter poor signal areas, or switch between towers. A disruption to the download process during the final stages can cause the device to freeze, so make sure the network indicator shows a stable signal before starting. 4G or LTE.
Preparing iPhone X for Mobile Data Downloads
Before you begin adjusting your settings, there are a few preparatory steps you should take to minimize the risk of failure. First, check your current iOS version in the Settings menu to determine how big the update will be. Then, free up space by deleting unnecessary photos, videos, or apps that can be easily restored from the cloud later.
Be sure to back up your data. While the update process usually goes smoothly, the risk of file corruption increases when using a less stable cellular network. Keeping important information safe iCloud or on your computer will become your insurance in case something doesn't go according to plan.
☑️ Checklist before updating
Battery life is another key factor. Cellular updates consume more power due to the modem constantly running at high load. Connect your device to a power source or ensure it's charged at least 50-60% to prevent it from shutting down at the most inopportune moment.
Step-by-step instructions: Activating downloads over a cellular network
The main update method is built directly into the operating system interface. You don't need to connect a cable or use a computer if you're prepared to proceed with caution. Open the app. Settings on yours iPhone X and go to the section Main.
Next, select the item Software updateThe system will contact Apple servers and check for a new version. If an update is found but is too large to download over a mobile network, you may see a message indicating that Wi-Fi is required. In this case, click the button Download or Download and install, ignoring the warning if it allows you to continue.
Settings → General → Software Update → Download and InstallIf the system absolutely refuses to start the download without Wi-Fi, try this trick: turn on Airplane Mode for 10 seconds, then turn it off, wait for the 4G/LTE icon to appear, and immediately try again to enter the update menu. Sometimes this helps reset the network settings cache and initiate the connection again.
What should I do if the download button is grayed out?
If the button is grayed out or unresponsive, Apple's servers may be overloaded or there may be a temporary certificate error. Try changing the date on your device back a month, checking for updates, and then resetting it to the correct date. This often updates SSL certificates and resolves the download blocking issue.
Solving common connection errors
During the download process, specific errors may occur, specific to cellular connections. Users often encounter a situation where the download starts but stalls at the "Time Estimate" or "Downloading" stage. This could indicate a weakened signal, or the carrier is blocking long connections.
Try switching the network type in the settings. Go to Settings → Cellular → Data Options → Voice & Data and force select LTE or 4G, disabling 5G if it's enabled. Despite high speeds, 5G networks in some regions are unstable and may drop connections during long transfers of large files.
| Error type | Probable cause | Solution method |
|---|---|---|
| Unable to check for update | DNS or server issues | Restart your router or switch to airplane mode |
| Not enough space | Low free memory | Delete photos/videos or apps |
| Error connecting to the server | Port blocking by the operator | Change DNS to 8.8.8.8 in Wi-Fi settings (for distributing) |
| The download is frozen | Unstable signal | Go to the window or change location |
It's also worth checking your date and time settings. If they're incorrect, you won't be able to establish a secure connection with Apple's servers. Make sure that the menu General → Date and Time the item is activated Automatically.
Alternative method: updating via computer
If a direct update on your phone isn't possible due to errors or insufficient memory, the most reliable method remains using a PC or Mac. This method allows you to download the firmware file to your computer (where you can use any available internet connection, even the one shared from your phone) and transfer it to iPhone X via cable.
For Windows users, you will need a program iTunes (or the Devices app in newer versions of Windows), and Mac owners with macOS Catalina and later should use FinderConnect your phone with a cable, select it from the list of devices and press the button RefreshThe computer will automatically download the latest version of iOS and install it on the phone.
The advantage of this method is that the firmware file is saved to your computer's hard drive. If the process is interrupted, you won't have to redownload gigabytes of data—the installation will continue from where it left off or be performed locally. This is the most stable option for older or problematic devices.
⚠️ Important: When updating via a computer, do not disconnect the USB cable until the process is complete. Disconnecting the connection while data is being written may damage the bootloader, requiring the phone to be restored in DFU mode.
Using tethering mode to bypass restrictions
There's another option that's often overlooked. If you have a second smartphone with an unlimited data plan or a powerful 4G/5G module, you can share its internet connection with yours. iPhone X via a hotspot. In this case, the phone will "think" it's connected to a Wi-Fi network and remove the file download size limit.
Enable Personal Hotspot on the donor device, connect to it from your iPhone X via Wi-Fi, and check for updates. The system will detect an active Wi-Fi connection and allow you to download a package of any size. However, the speed will ultimately be limited by the donor's mobile data connection, so this method is only effective with an excellent signal.
Make sure you have a suitable tariff plan connected to avoid unexpected bills from your telecom operator.
Frequently Asked Questions (FAQ)
Is it possible to update iPhone X via 3G network?
This is theoretically possible, but highly discouraged. 3G speeds are too slow to download files of 3-5 GB, and the process can take several hours. Furthermore, the unstable connection in 3G networks significantly increases the risk of errors and system damage.
How much data is used when updating iOS?
The amount of downloaded data depends on the system version, but is typically between 3 and 6 GB. If you're using a mobile network, be sure to monitor your remaining data plan, as carriers may charge a premium rate for every megabyte used beyond the limit.
What should I do if my phone is running slow after an update?
In the first few hours after installing a new iOS, the system indexes files and optimizes, which can cause overheating and slowdowns. If the issue persists for more than 24 hours, try resetting the settings. Settings → General → Transfer or reset iPhone → Reset all settings (the data will not be deleted).
Do I need to remove jailbreak before updating?
Yes, if on yours iPhone X If you have a jailbreak installed, updating through the settings or your computer will remove it. This may cause your device to stop booting unless special measures are taken. Before updating, it's recommended to make a full backup and be prepared for the possibility of losing your jailbreak.